alpha Racing Chain Adjuster Kit for BMW S1000 RR/HP4 (2010-, 2015-), black anodized with alpha Racing logo. Flexibly through 180° flip for fast rear sprocket adjustment (+/-1 tooth difference), fast track side adjusting of the drive chain. alpha Racing utilizes state-of-the-art computer automated design and experience in World Superbike Championship and brings you the very best in BMW S1000RR/HP4 billet parts. These special parts are high speed CNC machined, completely milled from high-strength aerospace grade billet aluminium and hard anodized for superior finish, ultra-lightweight and extreme durability. Weight: 0.18kg.